No recovery mode,no download mode

Hi i had buyed a samsung galaxy s5570 from a guy . The phone is open but it has a user pattern code... I had tried to enter in recovery but it doesn't work! The download mode doesn't work and usb jig only open the phone so no download mode! Help please! Sorry for my bad english!

XDA Developers was founded by developers, for developers. It is now a valuable resource for people who want to make the most of their mobile devices, from customizing the look and feel to adding new functionality.Are you a developer?